Diffoniq 2.0 is here.

Diffoniq is the next generation of WDiff32 — a small, native Windows tool that shows two text files, folders or archives side by side, differences marked line by line, changes dragged across from one side to the other. No extracting, no account, no cloud. Version 2.0 is out: download the full-featured 30-day evaluation, or buy a licence.

Download 2.0 Buy a licence

Windows 10/11, 64-bit · 30-day full-featured evaluation · registered WDiff32 users upgrade free

Three everyday cases

The daily “what changed?” — at the speed of a native Windows program.

Release check

Compare the shipped ZIP against the build folder before it goes out — every file, without unpacking.

Backup vs. backup

Two archive snapshots of the same project: see exactly which files changed between them — renames included.

Config drift

Exports from two servers side by side — differences highlighted down to the line, then synced with a click.

Fitting it into the tools you already use: step-by-step guides for git difftool, TortoiseGit and TortoiseSVN, JetBrains IDEs, comparing two ZIP files, checking a backup, Total Commander and WinSCP.

What it looks like

Four everyday views, straight from the released build — default colours, default font.

Text comparison of config_loader-2.3.cpp against config_loader-2.4.cpp: inserted and deleted lines highlighted, two changed lines with the changed characters marked — **Two versions of a source file.** Added, deleted and changed lines side by side; within a changed line, the changed characters are marked.

Diffoniq comparing the 7z archive atlas-2.4.7z on the left with the folder atlas-2.4 on the right: 24 files in the archive, 28 in the folder, the four extra files only on the right — **An archive against a folder.** The 7z opens like a directory; four files exist only in the folder — nothing was extracted.

Directory comparison of server against laptop with ignore rules active; the status bar reads 19 identical, 4 different, 2 left only, 2 right only — **Two trees, ignore rules on.** Files that differ only in their timestamp count as identical; the status bar sums it up.

Directory comparison of 24 files in which report-q3.txt on the left is matched with report-2026-q3.txt on the right as one renamed pair; three other files differ — **A rename is a rename.** `report-q3.txt` became `report-2026-q3.txt` — one pair with the name difference marked, not a deletion plus an addition.

What's new in 2.0

Same everyday “what changed?” tool, wider scope.

ZIP .zip · .jar

7-Zip .7z — new in 2.0

RAR .rar — new in 2.0

tar .tar · .gz · .bz2 · .xz · .zst — new

CAB .cab — new in 2.0

ISO .iso — new in 2.0

Archives behave like folders

Open an archive as if it were a directory and compare it against a folder or another archive — without extracting anything first, and files of the same size are checked by content.

Rename detection

Renamed or moved files are matched by content, so a rename shows up as a rename — not as one delete plus one add.

Edit while you compare

Mark areas, copy them to the other side, paste lines from the clipboard, undo — then save. Merging without leaving the diff.

Recursive directory compare

Whole trees side by side, with sorting, subfolder depth, and ignore rules for time, size, case, or files that exist on one side only.

Binary comparison

When a text diff isn't the right lens, Ctrl+B checks two files byte by byte.

Yours, locally

No account, no telemetry, no cloud. Your files never leave your machine.

All the details: What’s new · Changelog

Upgrading from WDiff32? Same tool, new name, bigger scope. Registered WDiff32 users get a Diffoniq 2.x licence free — no repurchase. Install 2.0 over it and your registration comes along — upgrade notes and licence claim.

Pricing

from $ 35 one-time, per user

Volume tiers for teams
Free full-featured 30-day evaluation
Free 2.x upgrade for WDiff32 licensees

Buy a licence

How it compares: vs Beyond Compare · vs free tools

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Imprint / Impressum: C.Sitte Softwaretechnik e.U., Mattsee, Austria — full details · privacy policy